JP4766189B1 - Endless belt manufacturing method - Google Patents

Abstract

An object of the present invention is to easily remove a resin film from a mold.
A coating film member 11 that is non-adhesive to the mold 1 is fixed to a part of the outer peripheral surface of a cylindrical mold 1 by a fixing member 161. A coating step of coating a portion with a coating film member 11, a coating step of applying a resin material to the outer peripheral surface of the mold 1 so as to cover a part of the coating film member 11, and a resin film by curing the resin material The resin film is manufactured by using a curing process for forming, and a drawing process for extracting the resin film from the mold 1 by inserting a gas into the gap between the mold 1 and the covering film member 11.
[Selection] Figure 3

Description

  The present invention relates to a method for manufacturing an endless belt.

  In the image forming apparatus, when a belt made of a plastic film is used for a photosensitive member, a charging member, a transfer member, a fixing member, and the like, a seamless endless belt is preferable. The material is preferably a polyimide resin or a polyamideimide resin.

  As a method for producing an endless belt of polyimide resin, a polyimide precursor solution (resin material) is applied to the surface of a cylindrical mold to form a coating film, and the coating film is dried and heated to react with the polyimide resin film. After forming (endless belt), the method of peeling a polyimide resin film from a metal mold | die is proposed (for example, refer patent document 1).

At this time, if the coating film is formed up to the axial end of the mold, the coating film sticks to the axial end of the mold. Therefore, from the viewpoint of easily pulling out the heated resin film, A method for blowing pressurized air into the gap is being sought.
For example, with a masking member (specifically, adhesive tape, etc.) provided on the outer periphery of both ends of the mold, a resin material is applied to form a coating film, and the coating film is heated and dried to form a resin film. After that, the masking member (adhesive tape, etc.) is peeled off together with the resin film at both ends, and the resin film is extracted from the mold while blowing pressurized air into the gap between the mold and the resin film formed by the peeling. A method is disclosed (for example, see Patent Document 2).

Japanese Patent Laid-Open No. 61-273919 JP 2006-218844 A

  The object of the present invention is to remove the mold from the mold as compared with the case where the non-adhesive coating film member is not used and / or the case where no gas is inserted into the gap between the outer peripheral surface of the mold and the non-adhesive coating film member. It is to easily remove the resin film.

The above object is achieved by the present invention described below.
That is, in the invention according to claim 1, a coating film member that is non-adhesive to the mold is fixed to a part of the outer peripheral surface of the cylindrical mold by a fixing member, and the outer periphery of the mold A coating step of coating a part of the surface in the circumferential direction with the coating film member; an application step of coating a resin material on the outer peripheral surface of the mold so as to cover a part of the coating film member; and the resin A curing step of curing the material to form a resin film, and a drawing step of extracting the resin film from the mold by inserting a gas into the gap between the outer peripheral surface of the mold and the coating film member. Prepared ,
In the covering step, the covering film member is coated on a part of the outer peripheral surface of the mold in the circumferential direction and the covering film member is fixed by the fixing member in the extracting step. The endless belt manufacturing method is performed such that gas is blown into the gap between the outer peripheral surface of the mold and the coating film member from the circumferential direction side of the mold in the region not covered with the resin film. .

  According to the first aspect of the present invention, compared with a case where a non-adhesive coating film member is not used and / or a case where no gas is inserted into the gap between the outer peripheral surface of the mold and the non-adhesive coating film member. The resin film can be easily removed from the mold.

Further , according to the first aspect of the present invention, compared with the case where the covering film member covers the entire circumferential direction of the outer peripheral surface of the mold, the region where the contamination by the resin material occurs is reduced.

Furthermore , according to the invention which concerns on Claim 1 , gas blows in into the clearance gap between the outer peripheral surface of a metal mold | die, and the film | membrane member for a coating from the circumferential direction side of the metal mold | die in the area | region which is not covered with the resin film of the film | membrane member for a coating. Therefore, the resin film can be easily removed from the mold as compared with the case where the covering film member is not fixed by the fixing member.

In the manufacturing method of an endless belt concerning a 1st embodiment, it is a schematic diagram showing a metal mold in which a part was covered with a membrane member for covering. In the manufacturing method of the endless belt which concerns on 1st Embodiment, it is the schematic of the other aspect which shows the metal mold | die partially coat | covered with the film | membrane member for coating | cover. In the manufacturing method of the endless belt which concerns on 2nd Embodiment, it is the schematic which shows the metal mold | die with which the one part was coat | covered with the membrane member for coating. In the manufacturing method of the endless belt which concerns on 2nd Embodiment, it is the schematic of the other aspect which shows the metal mold | die partially coat | covered with the film | membrane member for a coating | cover. In the manufacturing method of the endless belt which concerns on 3rd Embodiment, it is the schematic which shows the metal mold | die with which the one part was coat | covered with the film | membrane member for a coating | cover. In the manufacturing method of the endless belt which concerns on 3rd Embodiment, it is the schematic of the other aspect which shows the metal mold | die partially coat | covered with the film | membrane member for coating | cover. It is the schematic which shows the dip coating method. It is the schematic which shows a cyclic | annular application | coating method. It is the schematic which shows the coating method by a spin coater, (A) is the figure seen from the side, (B) It is the figure seen from the front. It is a block diagram of a core and a cutting die. It is explanatory drawing which cut | disconnects a membrane | film | coat. It is a schematic sectional drawing of the metal mold | die for cutting.

  Hereinafter, an embodiment of a manufacturing method of an endless belt according to the present invention will be described in detail.

  In the endless belt manufacturing method according to this embodiment, a resin material is applied to the outer peripheral surface of a mold partially covered with a non-adhesive covering film member so as to cover a part of the covering film member. After forming the coating film and heating and drying the coating film to form a resin film, the gas is blown into the gap between the non-adhesive coating film member and the outer peripheral surface of the mold, thereby allowing the gas to be resinized. In this method, the resin film is removed from the mold by inserting it into the gap between the film and the outer peripheral surface of the mold.

That is, the endless belt manufacturing method according to the present embodiment includes the following steps.
(1) Coating step A coating film member that is non-adhesive to the mold is fixed to a part of the outer peripheral surface of the cylindrical mold by a fixing member, and the circumferential direction of the outer peripheral surface of the mold is fixed. A part is coated with the coating film member.
(2) Application step A resin material is applied to the outer peripheral surface of the mold so as to cover a part of the covering film member.
(3) Curing step The resin material is cured to form a resin film.
(4) Extraction step Gas is inserted into the gap between the outer peripheral surface of the mold and the covering film member, and the resin film is extracted from the mold.
In the covering step, the covering film member is coated on a part of the outer circumferential surface of the mold in the circumferential direction and the covering member is fixed by the fixing member in the extracting step. Gas is blown into the gap between the outer peripheral surface of the mold and the covering film member from the circumferential side of the mold in the region not covered with the resin film of the film member.

According to the method of manufacturing an endless belt according to the present embodiment, in the (2) coating step and (3) curing step, the coating film member is in close contact with the outer peripheral surface of the mold, while (4) the extraction step In this case, since the coating film member is non-adhesive to the mold, gas is blown from the gap between the coating film member and the outer peripheral surface of the mold, and the gas is injected into the outer periphery of the resin film and the mold. The resin film is easily extracted from the mold by being inserted into the gap with the surface.
In addition, in the (3) curing step, it is presumed that the gas generated during the curing reaction of the resin material escapes from the gap between the coating film member and the outer peripheral surface of the mold. The resulting blister is suppressed.

Incidentally, (4) a step of removing the covering film member before the extraction step and a step of removing the fixing member fixing the covering film member to the outer peripheral surface of the mold may be provided. It is preferable to remove the covering film member and the fixing member together when the resin film is extracted from the mold in the (4) extraction step without providing a removal step.
By extracting the coating film member and the fixing member together with the resin film from the mold in the (4) extraction process, it is not necessary to separately provide a process for removing the coating film member and the fixing member, and the productivity is further improved.

-Position for coating with a coating membrane member-
In the method for producing an endless belt according to the present embodiment, Ru aspect der which the covering membrane member covers the portion of the circumferential direction of the outer peripheral surface of the mold.
In the gap between the coating film member and the outer peripheral surface of the mold, the resin material may invade in the application step (2). Material contamination may occur. However, since not only the entire circumference in the circumferential direction of the outer peripheral surface of the mold is covered with the coating film member, the region where the contamination occurs is reduced.

  The coating film member may be provided at both ends in the axial direction of the mold, and by applying a resin material so as to partially cover each coating film member, the axial direction of the mold Gas is blown into the gap between the outer peripheral surface of the mold and the covering film member from both sides.

-Position to be fixed by fixing member-
In the above aspect in which the coating film member covers a part in the circumferential direction of the outer peripheral surface of the mold, in the (4) extraction step, the periphery of the mold in the region not covered with the resin film of the coating film member. A part of the outer peripheral surface of the mold is covered with the coating film member so that gas is blown into the gap between the outer peripheral surface of the mold and the coating film member from the direction side, and the coating film is covered with the fixing member. member that is fixed.
That is, the coating film member is such that gas is blown into the gap between the outer peripheral surface of the mold and the coating film member from the circumferential direction side of the mold in the region not covered with the resin film of the coating film member. It is fixed to the mold by a fixing member. In other words, the circumferential direction side of the metal mold | die in the area | region which is not covered with the resin film of the membrane | film | coat member for coating | cover is not being fixed. As a result, gas is also blown from that portion, gas is satisfactorily inserted into the gap between the outer peripheral surface of the mold and the resin film, and the resin film is more easily extracted from the mold.

[First Embodiment]
1st Embodiment as a reference example in the manufacturing method of the endless belt of this embodiment is described in detail for every process. In addition to this process, various known processes may be provided.

-(1) Coating process-
(Mold)
First, the metal mold | die used for the manufacturing method of the endless belt of this embodiment is demonstrated. The mold is preferably a metal such as aluminum, stainless steel, nickel, or copper. The length of the mold needs to be longer than the width of the target endless belt, but the length of the mold is the target endless belt in order to secure a margin for the ineffective area generated at the end. It is more desirable that the length is 2% or more and 40% or less longer than the length. The outer diameter of the mold is matched to the diameter of the target endless belt, and the thickness is set to a thickness that can maintain the strength of the mold.

  A cylindrical mold is used. When the mass of the mold is large, it is preferable to attach holding plates to both ends thereof. The holding plate may have either a structure that sandwiches both ends of the mold or a structure that fits inside the mold. Further, the mold and / or the holding plate may be processed such as a step or notch. The method for attaching the holding plate may be screws or welding.

  Further, in order to prevent the formed resin film from adhering to the mold surface, it is preferable to impart releasability to the mold surface. As a method therefor, there are a method of plating the mold surface with chromium or nickel, coating with a fluororesin or silicone resin, or applying a release agent to the surface.

On the other hand, when a polyimide resin is used as the resin film, the polyimide resin has a property of generating a large amount of gas such as a volatile material of a distillation solvent during a heating reaction and a water vapor generated during the reaction. This is particularly noticeable when the thickness of the polyimide resin film is thicker than 50 μm.
Therefore, as disclosed in JP-A-2002-160239, it is preferable to roughen the mold surface to Ra 0.2 μm or more and 2 μm or less. Examples of the roughening method include blasting, cutting, sandpaper peeling, and the like. Thereby, the gas generated from the polyimide resin is discharged outside through a slight gap formed between the mold and the polyimide resin film.

(Coating)
In the first embodiment, (2) before the coating step, as shown in FIG. 1, a coating film member 11 is wound around a part of the outer peripheral surface of the mold 1 in the circumferential direction of the mold, and the coating film is formed. Both ends of the member 11 are affixed and fixed with a single-sided adhesive tape as the fixing member 161, and the outer peripheral surface of the mold 1 is covered with the covering film member 11. Although only one axial end of the mold 1 is shown in FIG. 1, the covering film member 11 may be provided at both axial ends. This is common to other embodiments described below.

  Moreover, as another aspect in 1st Embodiment, as shown in FIG. 2, the film | membrane film | membrane member 11 which stuck the double-sided adhesive tape as the fixing member 171 on the both ends of the longitudinal direction of the film | membrane film | membrane member 11 for a coating | mold is used as a metal mold | die. The outer peripheral surface of the mold 1 may be covered with the covering film member 11 by being wound around and fixed in the circumferential direction. 2 illustrates that the double-sided adhesive tape is affixed to the inside of the covering film member 11, that is, the surface facing the outer peripheral surface of the mold 1. FIG. Further, an adhesive may be used instead of the double-sided adhesive tape as the fixing member 171.

The coating film member 11 is non-adhesive to the mold (non-adhesive in the temperature range expected to be used, that is, from room temperature (20 ° C.) to (3) below the heating temperature in the curing step). There is no particular limitation as long as it is a film-like member having heat resistance to the temperature of heating in (3) curing step.
Specifically, a film-like member made of a resin material used for manufacturing an endless belt in the present embodiment, a polyimide resin, a polyamideimide resin, and the like can be given. Among these, a film-like member made of a resin material used for manufacturing an endless belt is preferable. For example, a cut end (a portion to be cut and removed) generated when manufacturing an endless belt may be used.

As the single-sided adhesive tape, the double-sided adhesive tape, or the adhesive, it is preferable to use one that has heat resistance to the heating temperature in (3) curing step.
As a material of the single-sided adhesive tape or the double-sided adhesive tape, polyimide, polyester, fluororesin, or the like is selected. Examples of the adhesive include polyimide resin, polyamideimide resin, polybenzimidazole resin, phenol resin, silicone resin, and acrylic resin. In particular, it is possible to use the same resin as the resin material used for manufacturing an endless belt. preferable.

− (2) Application process−
In the first embodiment, a resin material is applied to the outer peripheral surface of the mold 1 so as to cover a part of the covering film member 11. In FIGS. 1 and 2, the resin material is applied on the lower side with a boundary line K between the region where the resin material is applied and the region where the resin material is not applied.

  Examples of the material of the resin material (film forming resin solution) include polyimide, polyamideimide, polycarbonate, polyester, polyamide, and polyarylate. When the material is a thermoplastic resin, the solution is used, and when the material is a non-thermoplastic resin (thermosetting resin) such as polyimide, the precursor is used. The concentration, viscosity, etc. of the resin material can be freely selected.

For example, the polyimide precursor includes 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride (BPDA) and p-phenylenediamine (PDA), BPDA and 4,4′-diaminodiphenyl ether. Various known materials such as those consisting of pyromellitic dianhydride (PMDA) and 4,4′-diaminodiphenyl ether are used. In addition, two or more kinds of polyimide precursors may be mixed and used, or a plurality of acid or amine monomers may be mixed and copolymerized.
Examples of the solvent for the polyimide precursor include aprotic polar solvents such as N-methylpyrrolidone, N, N-dimethylacetamide, and acetamide. The mixing ratio, concentration, viscosity and the like of the polyimide precursor solution are freely selected.

As a method for coating the outer peripheral surface of the mold, a dip coating method in which the mold is immersed in a solution and pulled up, a flow coating method in which the solution is discharged onto the surface while rotating the mold, and the coating is leveled with a blade at that time. A known method such as a blade coating method is employed.
In addition, "applying on a metal mold | die" means apply | coating on the surface of the outer peripheral surface of a metal mold | die, or the surface of the layer, when it has a layer on this surface. “Drawing up the mold” is a relative relationship with the liquid level during application, and includes the case of “stopping the mold and lowering the coating liquid level”.

  When the coating is performed by a dip coating method, as described in JP-A-2002-91027, a method of controlling the film thickness with an annular body can be applied.

FIG. 7 is a schematic configuration diagram showing an example of an apparatus used for a dip coating method in which the film thickness is controlled by an annular body. However, the figure shows only the main part, and the holding plate of the mold 1 and other devices are omitted.
In this dip coating method, as shown in FIG. 7, an annular body 5 having a circular hole 6 larger than the outer diameter of the mold 1 is floated on the solution 2 placed in the coating tank 3, and the mold is passed through the circular hole 6. It is a method of pulling up 1 and applying.

  The material of the annular body 5 is selected from metals, plastics and the like that are not attacked by the solvent of the solution 2. Moreover, a hollow structure may be used so as to easily float, and a leg or an arm for supporting the annular body 5 may be provided on the outer peripheral surface of the annular body 5 or the coating tank 3 in order to prevent sinking.

  The annular body 5 is installed by a method such as floating on the solution 2 so that it can freely move in the horizontal direction on the solution 2, supporting the annular body 5 with a roll or a bearing, and supporting the annular body 5 with air pressure. To do. Further, the annular body 5 may be temporarily fixed so that the annular body 5 is positioned at the center of the coating tank 3.

  Since the film thickness of the coating film 4 is regulated by the gap between the outer diameter of the mold 1 and the inner diameter of the circular hole 6, the inner diameter of the circular hole 6 is adjusted by the required film thickness. Since the unevenness of the coating film thickness is also determined by the gap, the roundness of the circular hole 6 is important. The roundness is preferably 20 μm or less, and more preferably 10 μm or less. Of course, it is optimal that the roundness is 0 μm.

  If the inner wall surface of the circular hole 6 (inner circumference of the annular body 5) has a wide lower part immersed in the solution 2 and a narrow upper part, as shown in FIG. As shown in FIG. 8, a combined inclined surface may be used. Further, it may be stepped or curved.

  At the time of application, the mold 1 is pulled up through the circular hole 6. The pulling speed is preferably 0.1 m / min or more and 1.5 m / min or less. The solid content concentration of the polyimide precursor solution preferable for this coating method is 10 mass% or more and 40 mass% or less, and the viscosity is 1 Pa · s or more and 100 Pa · s or less.

  Further, the coating apparatus used for the dip coating method includes a mold holding means for holding the mold 1, a first moving means for moving the holding means in the vertical direction, and / or a coating tank 3 for moving in the vertical direction. You may have the 2nd moving means to do.

In the application step, as described above, the annular application method shown in FIG. 8 can also be applied. FIG. 8 is a schematic configuration diagram showing an example of an apparatus used for the annular coating method.
8A and 8B, the difference from FIG. 7 is that an annular sealing material 8 having a hole slightly smaller than the outer diameter of the mold 1 is provided at the bottom of the annular coating tank 7. When the mold 1 is inserted through the center of the annular sealing material 8 and the solution 2 is accommodated in the annular application tank 7, the solution 2 does not leak. The mold 1 is lifted up sequentially from the lower part to the upper part of the annular coating tank 7, and the coating film 4 is formed on the surface of the mold 1. Intermediate bodies 9 and 9 ′ that can be fitted to the mold 1 may be attached to the upper and lower sides of the mold 1. The function of the annular body 5 is as described above. Further, as shown in FIG. 8B, an elevation restricting member 8 </ b> A may be provided on the upper portion of the annular seal member 8 in order to prevent the annular body 5 from excessively rising.

  Moreover, you may apply | coat using the said solution 2 with a spin coater as shown to FIG. 9 (A) and FIG. 9 (B). In the spin coater, a MONO pump 21 is connected to a container 23 containing a resin material (solution 2), a discharge amount is adjusted, and a blade 22 made of a stainless steel plate or the like is attached immediately below the discharge liquid. The mold 1 is rotated, and the discharge part and the blade are moved from the left to the right in the drawing to apply the solution 2 to the outer peripheral surface of the mold 1.

-(3) Curing process-
In the curing step, the coating film formed on the mold 1 is dried by heating. That is, for the purpose of removing the solvent present in the coating film, heat drying is performed to such an extent that the coating film is not deformed even if the coating film is left standing. The heating and drying conditions depend on the type of resin and solvent, but are usually preferably 80 ° C. or higher and 170 ° C. or lower and preferably 30 minutes or longer and 60 minutes or shorter. At that time, the higher the temperature, the shorter the heating time. The temperature may be increased stepwise or at a constant rate over time. It is also effective to apply hot air during heating.

  When dripping occurs in the coating film during heating and drying, it is effective to make the axial direction of the mold 1 horizontal and rotate it slowly. The rotation speed is preferably 1 rpm or more and 60 rpm or less.

(Heat reaction treatment process)
In addition, when the resin material is a thermosetting resin, a film is formed only by the above-mentioned heat drying. However, when further high temperature drying is required, heating is performed (heating reaction treatment). For example, in the case of polyimide resin, it is preferably 250 ° C. or higher and 450 ° C. or lower, more preferably 300 ° C. or higher and 350 ° C. or lower. Is formed. At that time, it is preferable to completely remove the residual solvent before reaching the final heating temperature. Specifically, the residual solvent is heated at a temperature of 200 ° C. to 250 ° C. for 10 minutes to 30 minutes. It is preferable to dry and then heat by gradually increasing the temperature stepwise or at a constant rate.

− (4) Extraction process−
After the heat drying or heat reaction treatment, the endless belt is obtained by cooling to 50 ° C. or less and peeling the formed resin film from the mold.
At that time, as shown in FIG. 1 and FIG. 2, the outer peripheral surface of the mold 1 and the coating film member 11 are formed from the side of the coating film member 11 not covered with the resin film, that is, from the arrow A direction side. By blowing a gas (for example, air) into the gap, the gas is inserted into the gap between the outer peripheral surface of the mold 1 and the resin film, and the resin film and the coating film member 11 are extracted from the mold 1. By blowing a gas into the gap, the pressure reduces the adhesion between the mold and the resin film, and the peelability from the mold is improved.

  An air gun or the like is used as a means for blowing gas. The number of air guns is preferably more than one in order to increase the air volume. If the tip of the air gun has an elongated shape in accordance with the curvature of the mold, gas tends to enter the gap between the mold and the coating film member. The air pressure is preferably from 0.1 MPa to 0.6 MPa, more preferably from 0.1 MPa to 0.5 MPa. An air blow ring or the like can also be used.

  Since both ends of the endless belt are deformed, an unnecessary portion (invalid region) is cut, and the central effective portion (effective region) is used as a product. The endless belt may be further drilled or ribbed.

  Before removing the resin film from the mold, a cutting mold is provided at one end of the mold, the resin film is moved to the cutting mold, and the end of the moved resin film is cut. Processing may be performed.

  This cutting process will be described with reference to FIGS. In FIG. 10, a resin film 111 is formed on the outer peripheral surface (surface) of the mold 1. When the resin film 111 is extracted, the cutting mold 120 is placed in the axial direction of the mold 1 (downward on the paper surface in FIG. 10). Deploy. The cutting mold 120 has an outer diameter that is slightly smaller than the outer diameter of the mold 1 and only needs to be long enough to fit the resin film 111.

  In this way, the resin film 111 is extracted from the mold 1 and then fitted into the cutting mold 120. Next, as shown in FIG. 11, the cutting blade 121 is pressed and the cutting die 120 or the blade 121 is rotated to cut the resin film 111 to a required length. In the case where a plurality of endless belts are produced in advance, a plurality of cuttings can be performed by preparing a corresponding number of blades.

  In addition, as shown in FIG. 10, you may provide the groove | channel 123, a streak, etc. in the position which hits the cutter of the metal mold | die 120 for a cutting | disconnection.

  The outer diameter of the cutting mold 120 is preferably smaller than the inner diameter of the resin film 111 when the resin film 111 is fitted, and can be greatly changed so that the resin film 111 can be firmly held during cutting. For example, as shown in the cross-sectional view of FIG. 12, there is a method in which the interval can be adjusted by dividing into a plurality of constituent members 122a and 122b. After cutting in this manner, an endless belt is obtained by removing the resin film 111 from the cutting mold 120.

When the endless belt produced as described above is used as a transfer belt or a contact charging belt, a conductive substance may be dispersed in a polyimide material.
Examples of the conductive material include carbon black, carbon-based materials such as carbon beads granulated from carbon black, carbon fiber, carbon nanotube, and graphite; metals or alloys such as copper, silver, and aluminum; tin oxide, indium oxide, Examples thereof include conductive metal oxides such as antimony oxide and SnO ₂ —In ₂ O ₃ composite oxide.

When using an endless belt as a fixing belt, it is preferable to form a non-adhesive resin layer on the belt surface in order to improve the releasability of the toner adhering to the surface.
Non-adhesive materials include fluorine resins such as polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), and tetrafluoroethylene-hexafluoropropylene copolymer (FEP). Is preferred. Moreover, carbon powder, barium sulfate, or the like may be dispersed in the non-adhesive resin layer.

  In order to form these fluorine-based resin layers, a method in which the aqueous dispersion is applied to the surface of the endless belt and baked is preferable. Thus, in order to form a fluorine-based resin layer on the belt surface, a polyimide resin film may be formed on the surface of the mold and heated and then applied. However, the polyimide precursor solution is applied and the solvent is dried. After that, a fluororesin dispersion may be applied, followed by heating to perform an imidization reaction and a fluororesin firing process.

  When an endless belt is used as the fixing belt, the thickness of the polyimide resin is preferably 25 μm or more and 500 μm or less, and the thickness of the fluororesin layer is preferably 5 μm or more and 50 μm or less.

[Second Embodiment]
The second embodiment of the endless belt manufacturing method of the present embodiment will be described in detail for each step. Since the matters described in the first embodiment can be applied as they are except for those described below, the description thereof is omitted here.

-(1) Coating process-
(Coating)
In the second embodiment, (2) before the coating step, as shown in FIG. 3, a coating film member is formed on a part of the outer peripheral surface of the mold 1 and on a part of the mold 1 in the circumferential direction. 11 is arranged. That is, the covering film member 11 is fixed by adhering the end portion on the side not covered with the resin film in the coating process to the outer peripheral surface of the mold 1 with two single-sided adhesive tapes as the fixing member 162. The outer peripheral surface of the mold 1 is covered with the covering film member 11.

  Moreover, as another aspect in 2nd Embodiment, as shown in FIG. 4, the double-sided adhesive tape as the fixing member 172 in the edge part of the side of the film | membrane member 11 for a coating | coated which is not covered with a resin film in (2) application | coating process The covering film member 11 to which is attached may be fixed to a part of the mold circumferential direction, and the outer peripheral surface of the mold 1 may be covered with the covering film member 11. 4 illustrates that the double-sided adhesive tape is affixed to the inside of the covering film member 11, that is, the surface facing the outer peripheral surface of the mold 1. FIG. Further, an adhesive may be used instead of the double-sided adhesive tape as the fixing member 172.

In the endless belt manufacturing method according to the second embodiment, as shown in FIGS. 3 and 4, the covering film member 11 covers a part of the outer peripheral surface of the mold 1 in the circumferential direction. Still further, in the (4) extraction step, the mold 1 from the circumferential direction side of the mold 1 (that is, the arrow B direction side in FIGS. 3 and 4) in the region not covered with the resin film of the coating film member 11. A part of the outer peripheral surface of the mold 1 is covered with the covering film member 11 so that gas is blown into the gap between the covering film member 11 and the covering film member 11, and the covering film member 11 is fixed by the fixing member 162 or 172. It is fixed.

  For this reason, a region where contamination is caused by the resin material entering the gap between the coating film member 11 and the mold 1 in the (2) coating process is reduced. In addition, gas is also blown from the arrow B direction side, gas is satisfactorily inserted into the gap between the mold 1 and the resin film, and the resin film is further easily extracted from the mold 1.

− (2) Application process−
In the second embodiment, a resin material is applied to the outer peripheral surface of the mold 1 so as to cover a part of the covering film member 11. 3 and 4, the resin material is applied on the lower side with a boundary line K between the region where the resin material is applied and the region where the resin material is not applied.

− (4) Extraction process−
After the heat drying or heat reaction treatment, the endless belt is obtained by cooling to 50 ° C. or less and peeling the formed resin film from the mold.
At that time, as shown in FIGS. 3 and 4, the outer peripheral surface of the mold 1 and the coating film member from the side not covered with the resin film of the coating film member 11, that is, from the arrow A and arrow B directions. By blowing a gas (for example, air) into the gap between the mold 11 and the gas, the gas is inserted into the gap between the outer peripheral surface of the mold 1 and the resin film, and the resin film and the coating film member 11 are extracted from the mold 1.

[Third Embodiment]
3rd Embodiment in the manufacturing method of the endless belt of this embodiment is described in detail for every process. Since the matters described in the first embodiment can be applied as they are except for those described below, the description thereof is omitted here.

-(1) Coating process-
(Coating)
In the third embodiment, (2) before the coating step, as shown in FIG. 5, the coating film member 11 is formed on a part of the outer peripheral surface of the mold 1 and a part of the mold circumferential direction. Deploy. The covering film member 11 is (2) affixed and fixed to the outer peripheral surface of the mold 1 with one single-sided adhesive tape as the fixing member 163 at the end not covered with the resin film in the coating step, The outer peripheral surface of the mold 1 is covered with the covering film member 11.

  Moreover, as another aspect in 3rd Embodiment, as shown in FIG. 6, the double-sided adhesive tape as the fixing member 173 is attached to the edge part of the film | membrane member 11 for a coating | coated by the side which is not covered with a resin film in (2) coating process. The covering film member 11 to which is attached may be fixed to a part of the mold circumferential direction, and the outer peripheral surface of the mold 1 may be covered with the covering film member 11. FIG. 6 illustrates that the double-sided adhesive tape is affixed to the inner side of the coating film member 11, that is, the surface facing the outer peripheral surface of the mold 1. Further, an adhesive may be used instead of the double-sided adhesive tape as the fixing member 173.

In the endless belt manufacturing method according to the third embodiment, as shown in FIGS. 5 and 6, the covering film member 11 covers a part of the outer peripheral surface of the mold 1 in the circumferential direction. Furthermore, (4) in the extraction process, from the circumferential direction side of the mold 1 (that is, the arrow B direction side in FIGS. 5 and 6) in the region not covered with the resin film of the coating film member 11, the mold 1 A part of the outer peripheral surface of the mold 1 in the circumferential direction is coated with the coating film member 11 so that gas is blown into the gap between the outer peripheral surface of the coating film and the coating film member 11, and the coating film is formed by the fixing member 163 or 173. The member 11 is fixed.

  Therefore, the region where contamination is caused by the resin material entering the gap between the coating film member 11 and the outer peripheral surface of the mold 1 in the (2) coating process is reduced. Further, gas is blown from the arrow B direction side, gas is satisfactorily inserted into the gap between the outer peripheral surface of the mold 1 and the resin film, and the resin film is further easily extracted from the mold 1.

− (2) Application process−
In the third embodiment, a resin material is applied to the outer peripheral surface of the mold 1 so as to cover a part of the covering film member 11. In FIGS. 5 and 6, the resin material is applied on the lower side of the boundary line K between the region where the resin material is applied and the region where the resin material is not applied.

− (4) Extraction process−
After the heat drying or heat reaction treatment, the endless belt is obtained by cooling to 50 ° C. or less and peeling the formed resin film from the mold.
At that time, as shown in FIGS. 5 and 6, gas is introduced into the gap between the mold 1 and the coating film member 11 from the side of the coating film member 11 not covered with the resin film, that is, from the arrow B direction side. By blowing (for example, air), a gas is inserted into the gap between the mold 1 and the resin film, and the resin film and the covering film member 11 are extracted from the mold 1.

1 Mold 2 Solution (resin material)
3 coating tank 4 coating film 5 annular body 6 circular hole 7 annular coating tank 8 annular sealing material 8A lift regulating member 9 intermediate body 11 coating film member 21 MONO pump 22 blade 23 container 111 resin film 120 cutting mold 121 blade 123 groove 161, 162, 163, 171, 172, 173 fixing member

Claims (1)

A coating film member that is non-adhesive to the mold is fixed to a part of the outer peripheral surface of the cylindrical mold by a fixing member, and a part of the outer peripheral surface of the mold is circumferentially covered. A coating process for coating with a membrane member;
An application step of applying a resin material to the outer peripheral surface of the mold so as to cover a part of the coating film member;
A curing step of curing the resin material to form a resin film;
Inserting a gas into the gap between the outer peripheral surface of the mold and the covering film member, and extracting the resin film from the mold; and
Equipped with a,
In the covering step, the covering film member is coated on a part of the outer peripheral surface of the mold in the circumferential direction and the covering film member is fixed by the fixing member in the extracting step. A method for producing an endless belt, wherein gas is blown into the gap between the outer peripheral surface of the mold and the covering film member from the circumferential direction side of the mold in the region not covered with the resin film .